Hello,
On Wed, Aug 05, 2009 at 08:19:36AM +0200, Sam Ravnborg wrote:
> cc: linux-sparse
> On Tue, Aug 04, 2009 at 11:15:11PM +0100, Russell King - ARM Linux wrote:
> > On Tue, Aug 04, 2009 at 06:03:22PM -0400, H Hartley Sweeten wrote:
> > > When compiling the kernel with sparse, in arch/arm/mm/copypage-v4wb.c
> > > I get the following error:
> > >
> > > arch/arm/mm/copypage-v4wb.c:25:13: error: attribute 'naked': unknown attribute
> >
> > Sparse doesn't understand the naked attribute. GCC does.
> >
> > > /*
> > > * it doesn't make sense on ARM (currently the only user of __naked) to trace
> > > * naked functions because then mcount is called without stack and frame pointer
> > > * being set up and there is no chance to restore the lr register to the value
> > > * before mcount was called.
> > > */
> > > #define __naked __attribute__((naked)) notrace
> > >
> > > Is this macro actually correct? The compiler I am using is:
Quoting gcc documentation:
Use [naked] on the ARM, AVR, IP2K and SPU ports to indicate
that the specified function does not need prologue/epilogue
sequences generated by the compiler. It is up to the programmer
to provide these sequences.
This is typically used for functions that only consist of a single asm
statement.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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